package thread;

public class SyncDemo3 {
    public static void main(String[] args) {
        Boo b1=new Boo();
        Boo b2 = new Boo();
        Thread t1=new Thread(()->b1.doSome());
        Thread t2 = new Thread(()->b2.doSome());
        t1.start();
        t2.start();
    }
}

class  Boo {
    // public  synchronized  static  void  doSome(){
    public static void doSome() {
        synchronized (Boo.class) {
            try {
                Thread t = Thread.currentThread();
                System.out.println(t.getName() + ":正在执行doSome方法");
                Thread.sleep(5000);
                System.out.println(t.getName() + ":执行doSome完毕");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}